Characterization and Readout Optimization of Parity Measurements in Tetron Qubit Devices
ORAL
Abstract
We report on the optimization of a dispersive gate-sensing readout system for parity measurements in a tetron qubit device hosting four Majorana zero modes. We detail performance considerations of the reflectometry setup, including the use of a JTWPA and advanced signal processing techniques which enhanced the signal-to-noise ratio (SNR) relative to earlier results in [1]. We also discuss strategies for tuning the device and system to further optimize SNR and the use of methods for improved characterization of the qubit device and system. Taken together, our results enable robust projective parity readout and inform scalable readout strategies for topological qubits [2].
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Publication: [1] Microsoft Azure Quantum., Aghaee, M., Alcaraz Ramirez, A. et al. Interferometric single-shot parity measurement in InAs–Al hybrid devices. Nature 638, 651–655 (2025). https://doi.org/10.1038/s41586-024-08445-2
[2] Microsoft Quantum, Distinct Lifetimes for X and Z Loop Measurements in a Majorana Tetron Device, Arxiv 2507.08795 (2025).
Presenters
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Tareq El Dandachi
- Microsoft